Patent US3227866A successfully refreshed from Google Patents.
US3227866A
Expired / Lapsed
US
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Arc-welding helmet
Assignee: Individual
•
Filing: 1963-11-12
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Granted: 1966-01-04
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Rudolph W Peters
- 👤 Ronald L Peters
- 👤 Taylor William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:36
CPC Classifications
F; F21; F21L; F21L14/00; A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; F21V; F21V33/00; Y; Y10; Y10S; Y10S362/00; Y10S362/802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2196543A
Cited
GB631999A
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US2534786A
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Cited
US3086516A
Cited
US3021422A
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US3067426A
Cited
FR1342075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |